I drink at least 24 oz`s of dr,pepper every day

[Mao]

1) Dr. Pepper (or any soda) contains large quantity of fructose -> calories that are easily absorbed far from essential. Also, unlike glucose, our bodies do not limit the uptake of fructose -> it is all absorbed.
2) It is liquid calories -> liquid nutrition is absorbed by your body faster than solid nutrition. Also, we tend to ignore the caloric value of liquids (pop has no real essential nutritional value, but lots of calories)
3) The phosphorus in pop has a mainly inverse relationship with the calcium deposited in your bones -> increased ingestion of phosphorus causes resorption of calcium of your bones (essentially meaning that the calcium in your bones is eaten away)
4) The caffeine can lead to dependence (like people that *need* their daily coffee) and you may develop symptoms of withdrawal like migraines and decreased concentration if you try to quit cold turkey. From the Dr. Pepper alone, you are consuming almost 90mg of caffeine. Many people develop dependence with regular overall intake of ~100mg.
(Plus all the usual stuff about the acid eating away your enamel and so forth)

24oz is a lot of pop to drink daily, mate. If you really want to cut back, start by watering it down so that you drink less and keep adding more and more water and less and less Dr. Pepper until you wean yourself off. Good luck

This guy got it covered, just make sure to limit your intake of sodas. I suggest substituting it with fresh juice if you still want a tasty drink. Just like coffee, a cup/glass a day won't hurt. (I'm guilty of #4 )